Some great responses to the thread.
I sat in the back of an Acura TL for about a three hour road trip. I was very comfortable in back, and I am 6'2. The TL is slightly bigger than the 330i, but when I sat in the back of a 330i, during a test drive, I felt comfortable, my knees were not against the front driver's seat, and the driver was also 6'2. But , again it was just a test drive. I have been cross shopping the two cars as they fit my budget the best.
I love the 330i, so maybe I am trying to talk myself in to room in the back seat.
I will go try a test drive again from the back seat.